S
M
T
W
T
F
S
27
48°
38°
28
48°
37°
29
49°
37°
30
48°
38°
31
49°
38°
1
48°
37°
2
48°
36°
3
47°
37°
4
47°
38°
5
46°
37°
6
48°
34°
7
45°
34°
8
46°
33°
9
48°
37°
10
47°
32°
11
48°
32°
12
43°
31°
13
43°
32°
14
44°
34°
15
47°
34°
16
43°
33°
17
49°
31°
18
45°
32°
19
43°
32°
20
43°
33°
21
44°
32°
22
43°
39°
23
48°
36°
24
49°
33°
25
44°
32°
26
43°
34°
27
46°
37°
28
46°
32°
29
Hist. Avg.
43°
35°
30
Hist. Avg.
43°
35°
31
Hist. Avg.
43°
35°
1
Hist. Avg.
43°
35°
2
Hist. Avg.
43°
35°
3
Hist. Avg.
43°
35°
4
Hist. Avg.
43°
35°
5
Hist. Avg.
43°
35°
6
Hist. Avg.
44°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Cardiff
Cardiff's January 2027 forecast shows daily high temperatures ranging from 43° to 49°, with overnight lows between 31° and 39°. The average high for January is 46° with an average low of 35°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in Cardiff. See also: February | March | April.
